Session Abstract: Always characterized as "best effort," sign out is the Cinderella of identity flows. And yet: with the demise of 3P cookies, breaking the most adopted sign-out approaches will force everyone to pay closer attention. From backchannel logout to session-bound tokens, through CNAMEs tricks and APIs such as 1st Party sets, signing out will get trickier. This session will help you to make sense of it all.